Iowa, 2010Dense Fog in Iowa, December 29 to 31, 2010
December 29 to 31, 2010 · NWS ARX · 8 events in 8 counties and zones
Fog develop across northeast Iowa and reduced the visibility to less than mile for an extended period starting on the 29th and continuing through much of the 30th. The fog lingered well into the 31st along the Mississippi River.
Every event with a place to put it; 8 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 8
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
Fog develop across northeast Iowa and reduced the visibility to less than mile for an extended period starting on the 29th and continuing through much of the 30th. The fog lingered well into the 31st along the Mississippi River. During this period, an extended period of dense fog with visibilities of a quarter mile or less occurred. As an area of low pressure moved across the Midwest, warm air spread over the region and caused the deep snow pack to begin melting which resulted in the formation of the fog.
Dense Fog, Floyd
- When
- December 29, 9:30 AM CST to December 30, 8:00 PM CST
- Where
- Floyd forecast zone
- Reported by
- AWOS
- Coordinates
- 43.060, -92.789 (the zone’s center; the record gives no point)
The automated weather observing equipment at the Charles City airport reported a visibility in fog of a mile or less from the morning of the 29th into the evening of the 30th. During this period, the visibility was a quarter of a mile or less from the mid afternoon of the 29th into the evening of the 30th.
Dense Fog, Winneshiek
- When
- December 29, 10:15 AM CST to December 30, 9:30 PM CST
- Where
- Winneshiek forecast zone
- Reported by
- AWOS
- Coordinates
- 43.291, -91.844 (the zone’s center; the record gives no point)
The automated weather observing equipment at the Decorah airport reported a visibility in fog of a mile or less from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less from the mid morning into the late afternoon of the 30th.
Dense Fog, Mitchell
- When
- December 29, 10:45 AM CST to December 30, 7:45 PM CST
- Where
- Mitchell forecast zone
- Reported by
- Unknown
- Coordinates
- 43.356, -92.789 (the zone’s center; the record gives no point)
The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was a quarter of a mile or less from the mid afternoon of the 29th into the evening of the 30th.
Dense Fog, Chickasaw
- When
- December 29, 11:00 AM CST to December 30, 7:30 PM CST
- Where
- Chickasaw forecast zone
- Reported by
- Unknown
- Coordinates
- 43.060, -92.318 (the zone’s center; the record gives no point)
The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less during the morning of the 29th and again from the morning into the evening of the 30th.
Dense Fog, Clayton
- When
- December 29, 11:00 AM CST to December 31, 6:45 PM CST
- Where
- Clayton forecast zone
- Reported by
- Unknown
- Coordinates
- 42.845, -91.341 (the zone’s center; the record gives no point)
The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 31st. During this period, the visibility was reduced to a quarter of a mile or less from the early morning of the 30th into the early morning of the 31st.
Dense Fog, Fayette
- When
- December 29, 11:00 AM CST to December 30, 7:30 PM CST
- Where
- Fayette forecast zone
- Reported by
- Unknown
- Coordinates
- 42.863, -91.844 (the zone’s center; the record gives no point)
The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less during the morning of the 29th and again from the morning into the evening of the 30th.
Dense Fog, Howard
- When
- December 29, 11:30 AM CST to December 30, 8:00 PM CST
- Where
- Howard forecast zone
- Reported by
- Unknown
- Coordinates
- 43.357, -92.317 (the zone’s center; the record gives no point)
The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 30th. During this period, the visibility was reduced to a quarter of a mile or less from the mid morning into the late afternoon of the 30th.
Dense Fog, Allamakee
- When
- December 29, 1:30 PM CST to December 31, 6:45 PM CST
- Where
- Allamakee forecast zone
- Reported by
- Unknown
- Coordinates
- 43.284, -91.378 (the zone’s center; the record gives no point)
The visibility in fog was reduced to less than a mile from the morning of the 29th into the evening of the 31st. During this period, the visibility was reduced to a quarter of a mile or less from the early morning of the 30th into the early morning of the 31st.
- Dense Fog
- Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Blizzard and Heavy Snow in New Mexico, December 29 to 30, 20101 death · $5,000 · 61 kt wind · 23 events
- Dense Fog and Winter Weather in Minnesota, December 29 to 31, 20101 death · $10,000 · 10 events
- Avalanche in Montana, December 29, 20101 death · 1 injured · 1 event
- Winter Weather and Dense Fog in Wisconsin, December 29 to 31, 201010 injured · $338,000 · 13 events
- Heavy Snow and High Wind in Arizona, December 29 to 30, 201016 injured · $1,000 · 52 kt wind · 10 events
- Damaging Winds and Lightning Strike in Louisiana, December 29, 2010$5.0 million · 70 kt wind · 4 events
- Blizzard and Winter Storm in Montana, December 29 to 30, 201024 events
- Winter Storm and Winter Weather in Colorado, December 29 to 31, 201021 events
- Dense Fog in Wisconsin, December 29 to 31, 2010$10,000 · 20 events
- Blizzard and Heavy Snow in North Dakota, December 29 to 31, 201018 events
- Blizzard and Winter Storm in Wyoming, December 29 to 31, 201013 events
- Winter Storm in Wyoming, December 29 to 31, 201012 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 268720, 268723, 268722, 268717, 268718, 268719, 268721, 268716.